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50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# Copyright (c) 2021 Daniël van Noord <13665637+DanielNoord@users.noreply.github.com>
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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
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"""Checker for features used that are not supported by all python versions
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indicated by the py-version setting.
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"""
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from astroid import nodes
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from pylint.checkers import BaseChecker
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from pylint.checkers.utils import check_messages
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from pylint.interfaces import IAstroidChecker
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from pylint.lint import PyLinter
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from pylint.utils import get_global_option
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class UnsupportedVersionChecker(BaseChecker):
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"""Checker for features that are not supported by all python versions
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indicated by the py-version setting.
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"""
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__implements__ = (IAstroidChecker,)
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name = "unsupported_version"
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msgs = {
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"W1601": (
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"F-strings are not supported by all versions included in the py-version setting",
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"using-f-string-in-unsupported-version",
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"Used when the py-version set by the user is lower than 3.6 and pylint encounters "
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"a f-string.",
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),
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}
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def open(self) -> None:
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"""Initialize visit variables and statistics."""
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py_version = get_global_option(self, "py-version")
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self._py36_plus = py_version >= (3, 6)
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@check_messages("using-f-string-in-unsupported-version")
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def visit_joinedstr(self, node: nodes.JoinedStr) -> None:
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"""Check f-strings"""
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if not self._py36_plus:
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self.add_message("using-f-string-in-unsupported-version", node=node)
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def register(linter: PyLinter) -> None:
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"""Required method to auto register this checker"""
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linter.register_checker(UnsupportedVersionChecker(linter))
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